easyWhois goes beyond being able to view the whois records for any domain name. You can also fetch DNS settings for a domain such as nameservers, host records, mail exchangers and text records; as well as query information about IP addresses such as reverse lookup and geographical location.
It even contains a handy "What is my IP?" function for discovering the public IP address of your current network access point.
An iPhone version of the easyWhois.com website, this free utility is brought to you for by easyDNS: ICANN accredited registrar and DNS hosting experts since 1998.